JP5828160B2 - Precipitate removal device - Google Patents

Description

  The present invention relates to a precipitate removing device for removing precipitates in a treatment pond such as a sedimentation basin or a sand basin.

For example, a sedimentation pond is generally one that separates and settles from inflowing sewage and rakes it up to a pit in one direction and discharges it outside the pond. These devices include a flight circulation drive type and a pond bottom advance / retraction drive type with a scraper, but all have disadvantages such as structurally complicated and expensive.
In addition to these mechanical drive systems, there is a suction system that sucks and removes precipitates. This is structurally very simple and cheap to provide.
One of the exchange methods is a technique disclosed in Patent Document 1.

  JP 2005-28355 A

The technique according to the above-mentioned Patent Document 1 is a parallel treatment along the opposite side walls in a treatment basin having a rectangular plane such as a sedimentation basin and an aeration tank having opposite side walls and front and rear end walls orthogonal thereto. Guide rails are laid, and both guide rails are provided with longitudinal carriages that can be driven back and forth along the rails. Between the longitudinal carriages, a horizontal member that can move with the carriage is above the water surface. The horizontal member is provided with a pump that sucks in a target to be sucked such as sludge in the pond or floating scum. The suction target that is equipped and sucked by the pump is configured to be discharged out of the pond.
However, according to this technique, although the structure is simplified, there is only one suction point, so if the amount of sediment becomes abnormally high, such as when the river is flooding, there is a risk that it will not be sucked and will be clogged. was there.

  The present invention is intended to solve the problems of the conventional apparatus, and removes the precipitate having a simple structure that always exhibits the removal performance of the precipitate reliably and efficiently regardless of the amount of the precipitate. An object is to provide an apparatus.

In order to achieve the above-mentioned object, the invention according to claim 1 is provided on the bottom wall of a sedimentation basin having a rectangular plane having left and right side walls opposite to each other and front and rear end walls perpendicular to them. A plurality of guide rails parallel to the side wall or the end wall are laid in a separated state, and these guide rails are long cylindrical bodies whose longitudinal ends are closed and introduced into the cylindrical body. A bogie main body having a sludge pipe that discharges sludge and sewage to the outside of the pond by suction force is connected to the upper part of the trolley so that the center of the cylinder is perpendicular to the guide rail and the bottom of the cylinder is the bottom wall of the bottom wall It is installed in a state of being spaced apart in parallel upward, and is configured to be driven back and forth in the front-rear direction corresponding to the longitudinal direction of the guide rail via the traveling means, and the bottom surface of the cart body is a rectangular belt. A long flat surface and a plurality of The mouth is spaced in the longitudinal direction of the bottom surface and arranged in the center of the width corresponding to the front-rear direction of the bottom surface. It is equipped with a mud collecting scraper that guides to each suction port while gathering together, and this mud collecting scraper is formed of a plate-like plate with the plate surface oriented vertically and has a wide lateral opening at the front when moving forward and backward Before and after the scraper part that forms a concave mud collecting area where the entire suction port faces correspondingly above the narrowed back area in a narrow shape as it reaches the back part A plurality of continuous arrangements are provided in the longitudinal direction of the carriage main body so as to be adjacent on one side and adjacent on the other side .

As described above, according to the precipitate removing device of the present invention, the side wall or the end is disposed on the bottom wall of the sedimentation basin having a planar rectangle having the left and right side walls facing each other and the front and rear end walls orthogonal thereto. A plurality of guide rails parallel to the wall are laid apart, and these guide rails are long cylindrical bodies whose longitudinal ends are closed, and sludge and sewage introduced into the cylindrical body. The main body of the carriage, which is connected to the upper part of the drainage pipe for discharging the outside of the pond by suction force, is directed in the direction perpendicular to the guide rail and the bottom surface of the cylinder is parallel to the upper side of the bottom wall. It is installed in a separated state, and is configured to be driven forward and backward in the front-rear direction corresponding to the longitudinal direction of the guide rail via the traveling means, and the bottom surface of the cart body is a rectangular, belt-shaped flat And a plurality of suction ports on the bottom The bottom surface of the carriage main body is gathered with the forward / backward driving while collecting the sludge that is disposed in the center of the width of the bottom surface and arranged in the middle of the width corresponding to the front-rear direction. Equipped with a mud collecting scraper that guides to each of the suction ports, the mud collecting scraper is formed of a plate-like plate with the plate surface oriented vertically, and the width of the opening at the front when it advances and retreats is wide and reaches the back part. On the one side of the front and rear, which is the direction in which the scraper part that forms the concave mud collection area where the entire suction port faces correspondingly above the narrowed back area is advancing and retreating Since a plurality of adjacent vehicles are arranged in the longitudinal direction of the main body with the arrangement adjacent to each other on the other side, the amount of precipitation is not limited. Therefore, it is possible to provide a sediment removing device having a simple structure that always exhibits the sediment removing performance reliably and efficiently.

The top view which shows one Embodiment of the deposit removal apparatus of this invention. II-II sectional view taken on the line of FIG. The III-III line expanded sectional view of FIG. The IV-IV line expanded sectional view of FIG. The disassembled perspective view of a trolley | bogie with a traveling means and a mud scraper. Explanatory drawing which shows other embodiment. The top view which shows other embodiment. The top view which shows other embodiment. The top view which shows other embodiment. The top view which shows other embodiment. The longitudinal section side view showing other embodiments. The longitudinal section side view showing other embodiments. The longitudinal section side view showing other embodiments. The longitudinal section side view showing other embodiments. The front view which looked at the apparatus of FIG. 14 from the right side. The top view which shows other embodiment. The apparatus front view of FIG. The HH line expanded sectional view of FIG. The bottom view which shows the example of attachment of a mud collection scraper. The side sectional view showing other embodiments. The side sectional view showing other embodiments. The top view which shows other embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The plan example described in each embodiment can be applied to other embodiments.
In these drawings, reference numeral 1 denotes a treatment pond which is a sedimentation basin, which is a rectangular pond having left and right side walls 2 and 2 opposite to each other and front and rear end walls 3 and 3 which are perpendicular to them. An inflow portion such as a hole (not shown) is provided on the other end wall 3 so that rectified sewage flows as shown by an arrow Z. And the inclination board 4 ... for sedimentation promotion is arranged in the front-rear side and the front and back in multiple rows. The sludge (precipitate) that has settled on these is collected on the bottom wall 5 and conventionally collected so as to be scraped and dropped into the pit 6 at the left end of FIGS. 1 and 2 by various scraping means. .
FIGS. 1 and 2 are shown by dividing the sedimentation basin 1 in the middle of the front and rear and dividing it into upper and lower parts for the sake of space, but they are actually connected as they are. The bottom wall 5 in FIG. 2 is illustrated as a horizontal plane parallel to the water surface 7, but in actuality, the bottom wall 5 is inclined slightly downward continuously in the left direction of the figure. The bottom wall 5 may be a horizontal plane in FIG.

Reference numeral 10 denotes a guide rail, which is composed of a bottom plate 10a which is a belt-like shape and anchored on the bottom wall 5, and a rail body 10b made of an angle member integrated so as to form a mountain shape thereon. The bottom board 10a may be a short piece instead of a belt length and welded only at several places in the longitudinal direction of the rail body 10b.
1 and 2, the guide rail 10 is disposed at a distance from the upper half of the upstream half of the inflow direction of the sewage, and the remaining pair is the lower side of FIGS. As shown in FIG. All of the guide rails 10 are oriented in the direction perpendicular to the side wall 2. In this embodiment, the pair of guide rails 10 on the upstream side and the pair of guide rails 10 on the downstream side have the same interval.

  Reference numeral 12 denotes a carriage, which is composed of a carriage main body 13 and a wheel frame 14, and the carriage main body 13 is a rectangular tube-like and long one as shown in FIGS. 4 and 5, which itself is a main body member of the carriage. It functions as a piping member for flowing the sludge sucked together. An appropriate number of suction ports 15 are opened at a predetermined interval on the bottom wall of the carriage body 13, and sludge is sucked from here. Both ends of the carriage main body 13 are open, and the wheel frame 14 is welded and fixed as a blocking material. A pair of front and rear wheels (running means) 16 are attached to the wheel frame 14 so as to run on the guide rail 10. The wheel 16 may be replaced with a sliding member using a sliding resin. The wheel frame 14 may be height adjustable with respect to the wheel 16. On the other hand, the height of the carriage main body 13 may be adjustable with respect to the wheel frame 14.

  On the bottom side of the carriage body 13, a mud collecting scraper 18 is formed by welding or fastening so as to be bent and formed in a shape that repeats the shape of a circle as shown in FIG. The collecting mud scraper 18 has an end plate a, a first swash plate b, and a second swash plate c as elements, and the first swash plate b and the second swash plate c are formed in the shape of a circle and repeated. A sludge collecting area S that attracts and collects sludge on the front side and the back side is formed in the front and rear. At the end, sludge does not escape to the side and sludge is on the guide rail 10. In order not to cover, the end plate a having the plate surface directed in the advancing / retreating direction is provided, and the mud collection area S is formed here.

The suction ports 15 are arranged so as to correspond to the narrowed inner regions of the mud collection regions S.
Each of the mud collecting scrapers 18 may be provided with a main scraper 19 having an adjustable height such as an imaginary line as a main body so that the proximity distance to the bottom wall 5 can be adjusted.
Further, if the first swash plate b and the second swash plate c are separated as shown in the lower right column of FIG. 5 and a part of the sludge flows out between them, excessive mud collection can be avoided.
Further, as shown in the lower right column, the mud collection scraper 18 may be configured so as to avoid excessive mud collection by forming irregularities 18a at the lower end and part of the sludge getting out. It works effectively when there is excessive precipitation due to heavy rain.
Further, the mud collecting scraper 18 may be a brush-like one made of metal or resin as shown in the lower right column.

  On the other hand, on the bogie main body 13, a mud collecting pipe 24 composed of three pipe elements, that is, a rising pipe 21, a communication pipe 22 connecting them and a connecting pipe 23 combined into one, is attached so as to communicate with the bogie main body 13. It has been. As shown in FIG. 2, the number of the rising pipes 21 on the upstream side (shown in the upper stage of FIGS. 1 and 2) is increased as it reaches the upstream side of the communication pipe 22, and the number of the startup pipes 21 is as low as the downstream side. This is an arrangement method corresponding to the fact that the amount of precipitation tends to increase toward the upstream side. For example, it is arranged every 1 m on the upstream side and 1.5 m → 2 m on the downstream side thereafter. However, the arrangement intervals of all the risers 21 may be the same. When the intervals are the same, the suction diameter can be changed by increasing the opening diameters of the suction port 15 and the rising pipe 21 toward the upstream side and decreasing the downstream side. Further, the connecting pipe 23 is arranged so as to be slightly offset toward the upstream side of the communication pipe 22 so as to correspond to the amount of precipitation, but may be arranged in the middle in the longitudinal direction of the communication pipe 22, Also, a plurality of connecting pipes 23 may be used.

  As shown in FIG. 3, a flexible drainage pipe 26 is connected to each of the upstream and downstream connection pipes 23 so as to follow and maintain a communication state even when the apparatus advances and retreats. 26 is led to the pond upper side and is connected to the exhaust mud communication pipe 27. A mud pump (not shown) is connected to the tip of the mud communication pipe 27.

  On the other hand, a first lower bracket 30 and a second lower bracket 31 are fixed to be opposed to each other at a position slightly above the bottom wall 5 of each of the side walls 2 on the upstream and downstream sides. An advancing / retreating chain 33 is hung between the sprockets 32, 32, and both ends are connected to a connecting body 34 as shown in FIG. 4, and a fork 35 suspended from the front and rear of the connecting body 34 is a carriage. It hits so that vertical movement may be permitted before and after the main body 13.

  On the other hand, for driving, an upper bracket 37 is installed on the pond, a drive source 38 with a speed reducer is installed, and drive sprockets 39 and 39 and a drive chain 40 driven by the drive source 38 are provided. The advancing / retreating sprocket 32 is driven to reciprocate by interlocking with the conversion sprocket 41 of the first lower bracket 30 via the via.

  1 to 4 show a state in which only the upstream sediment removal device is driven in the forward direction indicated by the arrow X. FIG. Since the upstream sediment removal device has a larger precipitation amount than the downstream side as described above, the number of times of driving is not limited. For example, while the upstream device is driven three times, the downstream device is set to 1 The pattern is driven once. Of course, a pattern in which the downstream side is slowly advanced and retracted at 1/3 speed while the upstream side is advanced and retracted once may be employed. This double speed ratio is not limited to the above.

The case where the upstream device is driven in the direction of the arrow X will be described. First, when the drive source 38 is driven, the fork 35 is interlocked from the drive chain 40 via the advancing / retreating chain 33, and as shown in FIG. The cart 12 moves forward by the pressing force acting on the cart body 13 in the direction of the arrow X.
As a result, the sediment is collected while being collected in the confined mud collection area S as indicated by an arrow A. At that time, a mud pump (not shown) is driven and sucked through the mud collection pipe 24 through the mud collection pipe 24. Since the suction force acts on the mouth 15, the sediment (sludge) is sucked and discharged from the mud collecting pipe 24 to the outside of the pond through the mud pipe 26.

  When the apparatus moves backward in the direction of arrow Y, as shown by arrow B, the sediment is sucked from the backside mud collection area S through the suction port 15, and the sludge is discharged from the mud collection pipe 24 to the outside of the pond through the drainage pipe 26. Go. Thereby, sludge is removed by the reciprocating motion (advance and retreat) of the apparatus. For example, the drainage operation may be performed by suction only in one direction of the X direction or the Y direction. In addition, as shown in the right column of FIG. 4, in order to increase the suction force, a throttle portion 13 a may be provided before and after the suction port of the rising pipe 21 in the pipe that is the carriage body 13.

  Although not shown in the figure, a buoyant body made of foamed resin or the like may be provided in the bogie body 13 or the apparatus may be operated easily by giving buoyancy to the apparatus through the internal space (this fact) The same applies to the following embodiments). As the cart body 13 in FIG. 4, a square pipe which is a commercially available standard product can be used, or a pair of channel steel can be brought together to make a single square pipe. Further, the rising pipe 21 and the communication pipe 22 may be omitted, and the connection pipe 23 may be directly connected to the carriage main body 13. This also applies to the following embodiments.

6 to 10 show another embodiment of the mud collection scraper 18.
The embodiment of FIG. 6 corresponds to the tendency that the actual sediment accumulation amount in the sedimentation basin is large on the upstream side and small on the downstream side, as shown in the lower column of FIG. Although the configuration is different from that of the mud collecting scraper, the same reference numerals are applied, and the same applies hereinafter). Are arranged accordingly. Note that the mud collecting scraper 18 of the further downstream apparatus shown in the lower column of FIG. 1 may have the same pitch as in FIG. 6 or a longer pitch. It depends on the operating status of the device.

In the embodiment shown in FIG. 7, the mud collecting scraper 18 has a corrugated shape. Also in this case, the configuration of changing the pitch in FIG. 6 can be adopted.
In the embodiment of FIG. 8, the number of times of bending as in the above-described embodiment is plural, but a bow shape is formed by one bending. Mud collection is possible with both end plates.
In the embodiment of FIG. 9, the shape is bent once. A plurality of suction ports 15 may be arranged.
In the embodiment of FIG. 10, for example, the suction port 15 is disposed only corresponding to the front side of the mud collecting scraper 18 so that suction can be performed only during reciprocation. If the suction port 15 is provided on the rear side of the mud collecting scraper 18, the suction port 15 can be configured to suck only at the time of recovery.

11 to 15 show another embodiment of the carriage main body 13 and the mud collecting scraper 18 associated therewith. In this case as well, the configuration is different, but the same reference numerals as above are given.
In the embodiment of FIG. 11, the upper part of the carriage main body 13 is inclined forward and backward to prevent sediment (sludge) from accumulating on the upper surface as the sliding surface 13 b. In addition, you may equip the right part of a figure with the brush 45 supported by the side wall 2 so that the surface of the sliding surface 13b may be further cleaned like simultaneous illustration. This brush 45 may also be provided on the other side wall 2. Alternatively, the brush 45 may be provided only on one side, and the brush 45 may be configured to simultaneously clean the front and rear sliding surfaces 13b. For example, the brush 45 is extended to the left side or longer than that shown in the drawing.

  The embodiment of FIG. 12 shows a trolley body 13 in the form of a triangular cylinder having a sliding surface 13b. The riser pipe 21 communicates with the sliding surface 13b.

  In the embodiment shown in FIG. 13, the carriage main body 13 is made of a SUS material square pipe, and the corner ridges thereof are vertically oriented, and both ends of the pipe are closed by end plates 48. Wheel frames 14 and wheels 16 are provided at both ends of the main body 13 so as to be able to travel on the guide rail 10. At the front lower part of the cart body 13, suction ports 15 are opened at regular intervals in the longitudinal direction of the main body 13, and on the front side and the rear side, a mud collecting scraper using the lower slope of the main body 13. 18 is provided to suck the sediment from the suction port 15. The rising pipe 21 is provided via the upper slope of the main body 13.

  As shown in FIGS. 14 and 15, the mud collecting scraper 18 is not perpendicular to the main body 13 but spreads out in a letter C when viewed from above. The suction port 15 is provided only on the front side so as to be sucked at the time of forward movement. Further, as a means for moving the cart body 13 back and forth, as shown by the phantom line, the connecting body 34 and the fork 35 are reciprocated by the back and forth chain 33. 11 and 12 as well as those shown in FIGS. 14 and 15 constitute the same advancing / retreating means.

In this embodiment, since the slope 13b which is the upper surface of a square pipe is roof-shaped, there is no possibility that sludge accumulates here.
Moreover, since the cart body 13 has the square pipes inclined, the strength is very strong and lightweight.
Furthermore, since the mud collection scraper 18 is attached to the downward slope of the carriage main body 13, the mud collection scraper 18 has a merit that the carriage main body 13 side is reinforced. Further, since the lower slope of the carriage main body 13 and the mud collecting scraper 18 are enlarged, there is also a function of collecting and removing sediments floating on the bottom wall widely.
The cart body 13 may be a round pipe.

  In the embodiment of FIGS. 14 and 15, the carriage main body 13 is made of a SUS material square pipe and the corner ridges thereof are vertically oriented, and both ends of the pipe are closed by end plates 48. . Wheel frames 14 and wheels 16 are provided at both ends of the main body 13 so as to be able to travel on the guide rail 10. At the lower corner ridge of the carriage body 13, suction ports 15 are opened so as to be spaced apart in the longitudinal direction of the body 13, and the lower slope of the body 13 is used on the front and rear sides thereof. Then, a mud collecting scraper 18 is provided to suck the sediment from the suction port 15.

The rising pipe 21 is provided via the upper slope of the main body 13. The mud collecting scraper 18 is not orthogonal to the main body 13 but spreads out in a letter C when viewed from above. The suction port 15 is opened through the corner ridge portion of the carriage main body 13 so that the sediment can be sucked from the front and rear. The embodiment of FIGS. 14 and 15 is the same as the operational effect of the embodiment of FIG. 13, but in the case of FIGS. 14 and 15, the suction port 15 is arranged at the corner ridge so that the same port 15 can be manufactured. It becomes easy to do.
As shown in the right column of FIG. 14, the guide rail 10 and the traveling means 16 may be made of a resin that can easily slide. The combination shape in this case may be a triangular groove shape or a square groove shape as shown in the right column. 47 is a bracket.

  16 to 19 show another embodiment. In this embodiment, the carriage main body 13 is made of a SUS material, for example, a round pipe having a diameter of 100 to 300 mm, and a plurality of suction ports 15 are opened on the bottom surface, and both ends of the pipe are wheel frames with wheels 16. 14 in a closed state. The wheel 16 can travel on the guide rail 10. A mud collecting scraper 18 in which a round pipe is cut into a width of 50 to 100 mm is attached to the bottom surface of the carriage main body 13 in a horizontal circular shape so as to sandwich the suction port 15. Reference numeral 18 ′ denotes an auxiliary mud collecting scraper, which has a semi-circular shape and is provided corresponding to both ends of the carriage main body 13, and the suction port 15 is positioned between the mud collecting scraper 18.

A plurality of rising pipes 21 are provided on the carriage main body 13, and a communication pipe 22 is attached so as to communicate them. A connecting pipe 23 is erected at the center of the communication pipe 22, and these are used as a mud collecting pipe 24. A mud discharge pipe 26 is connected to the mud collection pipe 24.
Reference numeral 33 denotes an advancing / retreating sprocket; 34, a connecting body; 35, a fork; The mud collecting scraper 18 and the auxiliary mud collecting scraper 18 ′ are provided with a mounting plate 51 in a ring, and are attached to the bottom surface of the carriage main body 13 by a fastening tool 52.
As shown in FIG. 20, the rising pipe 21 and the communication pipe 22 may be omitted and integrated with the carriage main body 13, and the mud drain pipe 26 may be directly connected to the carriage main body 13. However, as in the embodiment shown in FIG. 17, the structure in which the communication pipe 22 is horizontally mounted in parallel with the carriage main body 13 and coupled to each other via the rising pipes 21... Since it is obtained high, the diameter of the carriage main body 13 can be made smaller in the two-upper and lower structure.
Further, as shown in FIG. 21, the carriage main body 13 may be a semi-circular or semi-elliptical cylinder with a bottom closed.

  A mud collecting region S gradually narrowing from the front and rear is formed by the semicircles facing each other between the mud collecting scrapers 18 and between the scraper 18 and the auxiliary mud collecting scraper 18 ′. When the advancing / retreating chain 33 is pushed in the X direction, the fork 35 pushes the carriage main body 13 in the X direction, whereby the wheel 16 rolls along the guide rail 10 so that the carriage 12 moves forward in the X direction. Sludge is sucked through the suction port 15 when the inside of the mud pipe 26 is brought into a suction state with advance. The sludge accumulated on the bottom wall is brought to the bottom of the cart body 13 while being collected in the mud collection area S that is gradually narrowed by the advancement of the cart body 13, and the mud pipe 26 is being sucked. As a result, the sludge is sucked through the suction ports 15 and is guided into the sludge pipe 26 through the riser pipe 21, the communication pipe 22, and the connection pipe 23.

  Contrary to the above, when the advancing / retreating chain 33 is pushed in the Y direction, the fork 35 pushes the carriage main body 13 in the Y direction, whereby the wheels 16 roll along the guide rail 10. The carriage 12 moves backward in the Y direction. When retreating, the sludge collected on the bottom wall is brought into the bottom of the cart body 13 while being collected in the mud collection area S, and sludge is sucked through the suction port 15 because the drainage pipe 26 is sucking. It is sucked and guided into the sludge pipe 26 through the riser pipe 21, the communication pipe 22 and the connection pipe 23. In this way, sludge is sucked and removed both forward and backward.

In the above embodiment, since a gap is provided between the mud collection scrapers 18 including the auxiliary mud collection scraper 18 ′, there is a room for the sludge to pass through the gaps, so that the sludge may be clogged between the mud collection scrapers 18. There is no.
In addition, if the diameter of the suction port 15 on the left side in FIG. 17 is increased and the diameter of the suction port 15 on the right side is decreased, as shown in the lower part of FIG. be able to.
In the above embodiment, the mud collecting scraper 18 and the auxiliary mud collecting scraper 18 ′ have a round ring shape, but they may be mud collecting scrapers as shown in FIGS. 5 to 10.

In the embodiment, two examples of the deposit removing device are shown. However, the number of precipitate removing devices may be three, four, or more, and the number is not particularly limited.
Further, the precipitate removing device performs suction by both reciprocating drives, but for example, suction may be performed only in one of the reciprocating motions, and suction may not be performed in the opposite direction.
Furthermore, although a pair of guide rails 10 are provided, for example, only one guide rail 10 may be provided in the middle as a monorail type, and in this case, a monorail type may be configured by a pair of parallel rails.

Further, as shown in FIG. 4, a gauge ring 43 may be provided in front of or behind the carriage 12 in either case where a pair of guide rails 10 are provided as in the above embodiment or a monorail type. . The gauge ring 43 may be adjustable in height.
Furthermore, as shown in FIG. 6, the amount of precipitation tends to increase on the upstream side and decrease on the downstream side. Correspondingly, the mud collection scraper 18 shortens the pitch on the upstream side as shown in FIG. The downstream side may be lengthened.

Moreover, in the said embodiment, although the removal apparatus was made to advance and retract in the width direction of a sedimentation basin, as shown in FIG. 22, you may make it advance and retract in the longitudinal direction of a sedimentation basin.
In this case, the carriages 12 in a plurality of rows are connected by a connecting member 75 with an interval of M, so that the state of the imaginary line in the figure advances and retreats from the retracted position to the advanced position of the solid line based on the stroke L. . The stroke L is equal to or longer than the apparatus interval M in order to suck all the precipitate. As described above, the guide rails 10 on both sides can be of a monorail type that passes through the center of the pond width. In this case, a gauge ring can be attached so that the left and right of the carriage 12 do not swing up and down. Further, although the apparatus has the carriages 12 arranged in the front and rear four rows, if the arrangement is arranged as a larger number of rows, for example, twice as many as eight rows, the stroke is the same as that of the embodiment. That is, a short one of about 1/2 of that is sufficient.

Each device is connected by a connecting member 75 and can be advanced and retracted at the same time, but each device may be driven individually. As the apparatus in this case, the apparatus of each embodiment shown in FIGS. 1 to 21 can be applied.
Further, the precipitate removing device can be controlled so that air can be blown out and sludge adhering to and staying on the inclined plate 4 of FIG. 2 is dropped. Further, the apparatus may be equipped with a cleaning member 77 such as a brush via a support 76 like a virtual line, and the bottom surface of the upper wall of the sedimentation basin may be cleaned using advance and retreat.

DESCRIPTION OF SYMBOLS 1 ... Sedimentation basin 10 ... Guide rail 12 ... Carriage 13 ... Carriage body 15 ... Suction port 16 ... Wheel (traveling means) 18 ... Mud collection scraper 26 ... Mud pipe 38 ... Drive source.

Claims (1)

A plurality of guide rails parallel to the side walls or the end walls are spaced apart from each other on the bottom wall of a flat rectangular sedimentation basin having left and right side walls facing each other and front and rear end walls perpendicular to them. These guide rails are long cylindrical bodies whose longitudinal ends are closed, and a drainage pipe for discharging sludge and sewage introduced into the cylindrical body to the outside of the pond by suction force. The main body of the carriage provided in communication with the guide rail is installed in a state where the center of the cylindrical body is directed in a direction perpendicular to the guide rail and the bottom surface of the cylindrical body is spaced parallel to the upper side of the bottom wall. The bottom surface of the carriage main body is a rectangular, band-like flat surface and a plurality of suction ports in the longitudinal direction of the bottom surface. At the front and back of the bottom surface The bottom side of the carriage body is equipped with a mud collecting scraper that guides the precipitated sludge to the suction ports while gathering together with the forward / backward drive, This mud collection scraper is formed of a plate-like plate with the plate surface oriented vertically, and when moving forwards and backwards, the width of the front opening is wide and narrows as it reaches the back, and the suction above the narrowed back area The scraper part that forms the concave mud collection area where the entire mouth faces each other is adjacent to one side of the front and rear, which is the direction to advance and retreat, and also adjacent to the other side. A plurality of precipitate removing devices provided continuously in the longitudinal direction of the cart body .

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